Rip cut

Rip cuts produce lumber of different cuts such as quarter sawn (A), flat or plain sawn (B), or rift sawn (other image).
The rift sawn rip cuts are perpendicular to the center of the log

In woodworking, a rip-cut is a type of cut that severs or divides a piece of wood parallel to the grain. The other typical type of cut is a cross-cut, a cut perpendicular to the grain. Unlike cross-cutting, which shears the wood fibers, a rip saw works more like a series of chisels, lifting off small splinters of wood. The nature of the wood grain requires the shape of the saw teeth to be different, thus the need for both rip saws and crosscut saws; however, some circular saw blades are combination blades and can make both types of cuts. A rip cut is the fundamental type of cut made at a sawmill.